Influencing Factors of Interfacial Behavior between Geogrid and Coal Gangue

Table 5

Variation of the shear stress caused by different transverse rib percentages of the geogrid.

Normal stress (kPa)	Percentage of geogrid transverse ribs (%)	Maximum shear stress (kPa)	Reduction of shear stress caused by percentage change in the number of geogrid transverse ribs (kPa)			Shear stress reduction caused by the percentage change of geogrid transverse ribs (%)
			100–75	100–50	75–50	100–75	100–50	75–50
25	100	49.8	3.9	7.4	3.5	7.83	14.86	7.63
	75	45.9
	50	42.4
50	100	79.9	6.2	18.5	12.3	7.76	23.15	16.69
	75	73.7
	50	61.4
100	100	118.1	6.9	28.9	22.0	5.84	24.47	19.78
	75	111.0
	50	89.2
150	100	149.4	8.4	26.6	18.2	5.62	17.80	12.91
	75	141.0
	50	122.8

Note. 100-75 in Table 5 indicates that the percentage of geogrid transverse ribs changes from 100% to 75%.